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1  /*
2   * ioctl interface for the scsi media changer driver
3   */
4  
5  /* changer element types */
6  #define CHET_MT   0	/* media transport element (robot) */
7  #define CHET_ST   1	/* storage element (media slots) */
8  #define CHET_IE   2	/* import/export element */
9  #define CHET_DT   3	/* data transfer element (tape/cdrom/whatever) */
10  #define CHET_V1   4	/* vendor specific #1 */
11  #define CHET_V2   5	/* vendor specific #2 */
12  #define CHET_V3   6	/* vendor specific #3 */
13  #define CHET_V4   7	/* vendor specific #4 */
14  
15  
16  /*
17   * CHIOGPARAMS
18   *    query changer properties
19   *
20   * CHIOVGPARAMS
21   *    query vendor-specific element types
22   *
23   *    accessing elements works by specifing type and unit of the element.
24   *    for example, storage elements are addressed with type = CHET_ST and
25   *    unit = 0 .. cp_nslots-1
26   *
27   */
28  struct changer_params {
29  	int cp_curpicker;  /* current transport element */
30  	int cp_npickers;   /* number of transport elements      (CHET_MT) */
31  	int cp_nslots;     /* number of storage elements        (CHET_ST) */
32  	int cp_nportals;   /* number of import/export elements  (CHET_IE) */
33  	int cp_ndrives;    /* number of data transfer elements  (CHET_DT) */
34  };
35  struct changer_vendor_params {
36  	int  cvp_n1;       /* number of vendor specific elems   (CHET_V1) */
37  	char cvp_label1[16];
38  	int  cvp_n2;       /* number of vendor specific elems   (CHET_V2) */
39  	char cvp_label2[16];
40  	int  cvp_n3;       /* number of vendor specific elems   (CHET_V3) */
41  	char cvp_label3[16];
42  	int  cvp_n4;       /* number of vendor specific elems   (CHET_V4) */
43  	char cvp_label4[16];
44  	int  reserved[8];
45  };
46  
47  
48  /*
49   * CHIOMOVE
50   *    move a medium from one element to another
51   */
52  struct changer_move {
53  	int cm_fromtype;	/* type/unit of source element */
54  	int cm_fromunit;
55  	int cm_totype;	/* type/unit of destination element */
56  	int cm_tounit;
57  	int cm_flags;
58  };
59  #define CM_INVERT   1   /* flag: rotate media (for double-sided like MOD) */
60  
61  
62  /*
63   * CHIOEXCHANGE
64   *    move one medium from element #1 to element #2,
65   *    and another one from element #2 to element #3.
66   *    element #1 and #3 are allowed to be identical.
67   */
68  struct changer_exchange {
69  	int ce_srctype;	    /* type/unit of element #1 */
70  	int ce_srcunit;
71  	int ce_fdsttype;    /* type/unit of element #2 */
72  	int ce_fdstunit;
73  	int ce_sdsttype;    /* type/unit of element #3 */
74  	int ce_sdstunit;
75  	int ce_flags;
76  };
77  #define CE_INVERT1   1
78  #define CE_INVERT2   2
79  
80  
81  /*
82   * CHIOPOSITION
83   *    move the transport element (robot arm) to a specific element.
84   */
85  struct changer_position {
86  	int cp_type;
87  	int cp_unit;
88  	int cp_flags;
89  };
90  #define CP_INVERT   1
91  
92  
93  /*
94   * CHIOGSTATUS
95   *    get element status for all elements of a specific type
96   */
97  struct changer_element_status {
98  	int             ces_type;
99  	unsigned char   __user *ces_data;
100  };
101  #define CESTATUS_FULL     0x01 /* full */
102  #define CESTATUS_IMPEXP   0x02	/* media was imported (inserted by sysop) */
103  #define CESTATUS_EXCEPT   0x04	/* error condition */
104  #define CESTATUS_ACCESS   0x08	/* access allowed */
105  #define CESTATUS_EXENAB   0x10	/* element can export media */
106  #define CESTATUS_INENAB   0x20	/* element can import media */
107  
108  
109  /*
110   * CHIOGELEM
111   *    get more detailed status information for a single element
112   */
113  struct changer_get_element {
114  	int	cge_type;	 /* type/unit */
115  	int	cge_unit;
116  	int	cge_status;      /* status */
117  	int     cge_errno;       /* errno */
118  	int     cge_srctype;     /* source element of the last move/exchange */
119  	int     cge_srcunit;
120  	int     cge_id;          /* scsi id  (for data transfer elements) */
121  	int     cge_lun;         /* scsi lun (for data transfer elements) */
122  	char    cge_pvoltag[36]; /* primary volume tag */
123  	char    cge_avoltag[36]; /* alternate volume tag */
124  	int     cge_flags;
125  };
126  /* flags */
127  #define CGE_ERRNO     0x01       /* errno available       */
128  #define CGE_INVERT    0x02       /* media inverted        */
129  #define CGE_SRC       0x04       /* media src available   */
130  #define CGE_IDLUN     0x08       /* ID+LUN available      */
131  #define CGE_PVOLTAG   0x10       /* primary volume tag available */
132  #define CGE_AVOLTAG   0x20       /* alternate volume tag available */
133  
134  
135  /*
136   * CHIOSVOLTAG
137   *    set volume tag
138   */
139  struct changer_set_voltag {
140  	int	csv_type;	 /* type/unit */
141  	int	csv_unit;
142  	char    csv_voltag[36];  /* volume tag */
143  	int     csv_flags;
144  };
145  #define CSV_PVOLTAG   0x01       /* primary volume tag */
146  #define CSV_AVOLTAG   0x02       /* alternate volume tag */
147  #define CSV_CLEARTAG  0x04       /* clear volume tag */
148  
149  /* ioctls */
150  #define CHIOMOVE       _IOW('c', 1,struct changer_move)
151  #define CHIOEXCHANGE   _IOW('c', 2,struct changer_exchange)
152  #define CHIOPOSITION   _IOW('c', 3,struct changer_position)
153  #define CHIOGPICKER    _IOR('c', 4,int)                        /* not impl. */
154  #define CHIOSPICKER    _IOW('c', 5,int)                        /* not impl. */
155  #define CHIOGPARAMS    _IOR('c', 6,struct changer_params)
156  #define CHIOGSTATUS    _IOW('c', 8,struct changer_element_status)
157  #define CHIOGELEM      _IOW('c',16,struct changer_get_element)
158  #define CHIOINITELEM   _IO('c',17)
159  #define CHIOSVOLTAG    _IOW('c',18,struct changer_set_voltag)
160  #define CHIOGVPARAMS   _IOR('c',19,struct changer_vendor_params)
161  
162  /* ---------------------------------------------------------------------- */
163  
164  /*
165   * Local variables:
166   * c-basic-offset: 8
167   * End:
168   */
169